The Correct Way to Improvise

Bill Arnet is an experienced improviser at I.O. Chicago (Improv Olympic) and wrote a short piece about various ways of approaching an improv scene, especially at the opening. It definitely got me thinking, and I plan on trying his "slice from typical life" opening this Wednesday during the last hour.
By the way, the heading for this entry is the name of his article, not a policy of the SBIW.